Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1984-10-16
1986-09-23
Phillips, Delbert R.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C07K 506
Patent
active
046134603
ABSTRACT:
A process for preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester: ##STR1## in which: (a) the compound methyl N(.alpha.-L-aspartyl).alpha.-aminocinnamate, protected at the nitrogen, of formula: ##STR2## where R is a protector group at the nitrogen, is subjected to hydrogenation at the olefin bond by means of gaseous hydrogen in the presence of a hydrogenation catalyst, to give the compound of formula: ##STR3## where R has the aforesaid meaning, in the form of a mixture of .alpha.-L-aspartyl-L-phenylalanine methyl ester protected at the nitrogen, and .alpha.-L-aspartyl-D-phenylalanine methyl ester protected at the nitrogen;
REFERENCES:
patent: 3901871 (1975-08-01), Anderson
King et al., J. Org. Chem., 46, 4780-4782 (1981).
Vogel, Practical Organic Chem., 3rd Ed., Langmans, Green and Co., N.Y., p. 474.
Casati Paolo
Elefante Biagio
Fuganti Claudio
DE.BI Derivati Biologici International S.p.A.
Moezie F. T.
Phillips Delbert R.
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